Metamorphic Rocks

Question 1

How are metamorphic rocks changed?

Answer 1

By heat, pressure, or chemically active solution

Question 2

How are metamorphic rocks classified?

Answer 2

By texture, mineral assemblages, and grade

Question 3

Where would most metamorphism occur at?

Answer 3

Near convergent or former convergent plat boundaries

Question 4

What are the agents of metamorphism?

Answer 4

Heat, pressure, and chemically active solutions

Question 5

What are the 3 types of metamorphism?

Answer 5

Regional, Contact, and Dynamic

Question 6

What helps form regional metamorphism rocks?

Answer 6

Pressure, heat, and stress (convergent) at great depth

Question 7

What helps form contact metamorphism rocks?

Answer 7

Heat along intrusions

Question 8

What helps form dynamic metamorphism rocks?

Answer 8

Faulting, pressure, and stress (transform) near the surface

Question 9

What does metamorphic textures refer to?

Answer 9

Size, shape, and arrangement of grains

Question 10

What are the 2 types of metamorphic textures?

Answer 10

Foliated & Nonfoliated

Question 11

Where are most foliated metamorphic rocks?

Answer 11

Convergent plate boundaries and subduction zones

Question 12

What’s foliation?

Answer 12

Layered structure, parallel alignments of flattened mineral grains and pebbles

Question 13

What kind of stress do rocks before and after metamorphism?

Answer 13

Before: Uniform
After: Differential

Question 14

What’s the metamorphism process for shale?

Answer 14

Shale -> Slate -> Phylite -> Shist -> Gnesis -> Granite

Question 15

What are some examples of nonfoliated metamorphic rocks?

Answer 15

Marble and Quartzite

Question 16

What’s regional metamorphism?

Answer 16

Foliated metamorphic rocks and changes in texture with increasing heat and pressure

Question 17

What’s dynamic metamorphism?

Answer 17

Crushing, grinding, and reorganization of rock along fault zones

Question 18

What’s another words for word for fault zones?

Answer 18

Mechanical deformation

Question 19

What’s fault breccia?

Answer 19

Dynamic metamorphism shallow in the crust

Question 20

What’s mylonite?

Answer 20

Dynamic metamorphism deep in the crust

Question 21

Where does low temperature and high-pressure zone occur on convergent plate boundaries?

Answer 21

Very close to the oceanic crust

Question 22

Where does high temperature and high-pressure zone occur on convergent plate boundaries?

Answer 22

Between the low temperature and high-pressure zone and the high temperature and low-pressure zone

Question 23

Where does high temperature and low-pressure zone occur on convergent plate boundaries?

Answer 23

Near the middle of the formation of a volcano

Question 24

What is the setting for regional metamorphism?

Answer 24

Regional metamorphism

Question 25

What is the metamorphic process for limestone?

Answer 25

Limestone -> marble

Question 26

What is the metamorphic process for sandstone?

Answer 26

Sandstone -> Quartzite

Question 27

What are the characteristics of nonfoliated metamorphic rocks?

Answer 27

Grains stay oriented and are most hornfels

Question 28

What’s breccia?

Answer 28

Broken up, angular rock debris cemented together

Question 29

What’s another word for contact zone?

Answer 29

Hornfels that are baked

Question 30

What’s the dark sill intruded in hornfels?

Answer 30

Mafic